Remove test duplication between tempest and n-t-p RoutersDVRTest

RoutersDVRTest -https://opendev.org/openstack/tempest/src/branch\
/master/tempest/api/network/admin/test_routers_dvr.py has same
functionality in tempest and neutron-tempest-plugin, so with
removing these tests from tempest we can get rid of whole module,
reducing the test duplications.

Change-Id: Ie7d37def794a3cbdb2444ebbeba237fd58ddfb8a

neutron_tempest_plugin/api/admin/test_routers_dvr.py

@@ -1,105 +0,0 @@
-# Copyright 2015 OpenStack Foundation
-# All Rights Reserved.
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.
-
-from tempest.lib.common.utils import data_utils
-from tempest.lib import decorators
-
-from neutron_tempest_plugin.api import base_routers as base
-
-
-class RoutersTestDVRBase(base.BaseRouterTest):
-
-    required_extensions = ['router', 'dvr']
-
-    @classmethod
-    def resource_setup(cls):
-        # The check above will pass if api_extensions=all, which does
-        # not mean DVR extension itself is present.
-        # Instead, we have to check whether DVR is actually present by using
-        # admin credentials to create router with distributed=True attribute
-        # and checking for BadRequest exception and that the resulting router
-        # has a distributed attribute.
-        super(RoutersTestDVRBase, cls).resource_setup()
-        name = data_utils.rand_name('pretest-check')
-        router = cls.admin_client.create_router(name)
-        if 'distributed' not in router['router']:
-            msg = "'distributed' attribute not found. DVR Possibly not enabled"
-            raise cls.skipException(msg)
-        cls.admin_client.delete_router(router['router']['id'])
-
-
-class RoutersTestDVR(RoutersTestDVRBase):
-
-    @decorators.idempotent_id('08a2a0a8-f1e4-4b34-8e30-e522e836c44e')
-    def test_distributed_router_creation(self):
-        """Test distributed router creation
-
-        Test uses administrative credentials to creates a
-        DVR (Distributed Virtual Routing) router using the
-        distributed=True.
-
-        Acceptance
-        The router is created and the "distributed" attribute is
-        set to True
-        """
-        name = data_utils.rand_name('router')
-        router = self._create_admin_router(name, distributed=True)
-        self.assertTrue(router['distributed'])
-
-    @decorators.idempotent_id('8a0a72b4-7290-4677-afeb-b4ffe37bc352')
-    def test_centralized_router_creation(self):
-        """Test centralized router creation
-
-        Test uses administrative credentials to creates a
-        CVR (Centralized Virtual Routing) router using the
-        distributed=False.
-
-        Acceptance
-        The router is created and the "distributed" attribute is
-        set to False, thus making it a "Centralized Virtual Router"
-        as opposed to a "Distributed Virtual Router"
-        """
-        name = data_utils.rand_name('router')
-        router = self._create_admin_router(name, distributed=False)
-        self.assertFalse(router['distributed'])
-
-
-class RouterTestCentralizedToDVR(RoutersTestDVRBase):
-
-    required_extensions = ['l3-ha']
-
-    @decorators.idempotent_id('acd43596-c1fb-439d-ada8-31ad48ae3c2e')
-    def test_centralized_router_update_to_dvr(self):
-        """Test centralized to DVR router update
-
-        Test uses administrative credentials to creates a
-        CVR (Centralized Virtual Routing) router using the
-        distributed=False.Then it will "update" the router
-        distributed attribute to True
-
-        Acceptance
-        The router is created and the "distributed" attribute is
-        set to False. Once the router is updated, the distributed
-        attribute will be set to True
-        """
-        name = data_utils.rand_name('router')
-        # router needs to be in admin state down in order to be upgraded to DVR
-        router = self._create_admin_router(name, distributed=False,
-                                           ha=False, admin_state_up=False)
-        self.assertFalse(router['distributed'])
-        self.assertFalse(router['ha'])
-        router = self.admin_client.update_router(router['id'],
-                                                 distributed=True)
-        self.assertTrue(router['router']['distributed'])